Propelling mechanism



May 26, 1931. J. PIANO PROPE LLING MECHANISM iifiiled Aug. 18. 19-30 5sheets-sheep 1 t/be Piano A llomey May 26, 1931. J. mm

PROPELLING macnmlsm Filed Aug; I 18, 193g 5 Sheets-Sheet 2 flbe Pianofig mwdaih.

A llomey May 26, 1931.

J. PIANO 1,807,254

PROPELLING MECHANISM 5 Sheets-Sheet 3 Filed Aug. 18, 1930 I nvenlor 1706Piano Q y @gl Z2 Allorney May 26, 1931. i J. PIANO PROPELLING MECHANISMFiled Aug. 18, 1930 5 Sheets-Sheet 4 in Q a: w 'E 22 i 'l' q I m a a o xV Inventor is Joe Piano May 26, 1931. J. IA Q 1,807,254

PROPELLING MECHANI SM tially on the line Patented May 26, 1931 UNITEDSTATES PATENT (JFFICETF JOE PIANO, or CHICAGO, rumors PBOPELLINGMECHANISM Application filed August 18, 1930. Serial in. 476,126.

The present invention relates to a propelling mechanism and has for itsprime ob ect to provide rotating propellers which reciprocate back andforth along their axes.

Another very important object of the invention resides in the provisionof a propelling mechanism of this nature comprising a pair of rotatingpropellers on a common axis, said propellers reciprocating back andforth oppositely to each other.

A still further ver imortant object of the invention resides in tfieprovision of a propelling mechanism of this nature which is simple inits construction, strong and durable, compact and convenient in itsarrangement of parts, thoroughly efficient and reliable in use andoperation, and otherwise well adapted to the purpose for which itisdesigned.

With the above and numerous other objects in View as will appear as thedescription proceeds, the invention resides in certain novel features ofconstruction,and in the combination and arrangement of parts as will behereinafter more fully described and claimed.

In the drawings:

Figure 1 is a side elevation of the mechanism embodying the features ofmy invention showing the same in a boat, the portion of the boat beingshown in section,

Figure 2 is a top plan View of the mechanism,

Figure 3 is an enlarged detail side elevation thereof,

Figure 4 is a sectional view taken substan- L- l of Figure 3,

Figure 5 is a detail section taken substantially on the line 55 ofFigure 3,

Figure6 is a perspective view of one end of the outer shaft,

Figure 7 is a longitudinal Vertical section taken substantially on theline 77 of Figure 2,

Figures 8 and 9 are sectional views taken substantially on the lines 88and 99 of Figure 7.

Referring in I have shown a practical embodiment of the invention inwhich numerous changes in the details of construction may be resorted towithout departing from the spirit of the 31 and is engaged by to thedrawings in detail whereinvention, it will be seen that the numeral 5denotes a base from which rises a standard 6 having a bearing 7 at theupper end thereof in which is journalled a hub 8 of a double crown gear9. The bore of this hub ,is squarev to receive an outer hollow squareshaft 10 in which is an inner square shaft 11. A thrust bearing 12, isdisposed about the hub 8 at one end of the' bearing 7. A plurality ofrollers 14: are held in place by means 15 so asto be disposed about theshaft 10, the axes of the bearing roller 14 being at right angles to theaxis of the shafts 10 and 11. Thus the shaft 10 is free to reciprocatethrough the hub 8. The shaft 10 at one endhas a plurality of bearingrollers 16 held in place by suitable means 17 to bear against the facesof the shaft 11 to permit reciprocation of the shaft 11 in the shaft 10.

-Numeral 20. denotes a reciprocating element operated by any suitablemotive power which has a connection 21 with one end of the inner shaft11, and the connection 2i is formed with an extension 22 with which isengaged pivotally a pitman 24: which is engaged with a stud 25 on a gear26 journalled on a stud 27 projecting from the bearing 7. This gear 25is in mesh with one side of the double crown gear 9. A standard 28" isformed with a lateral extension 29 at its upper end having a stud 3Oprojecting therefrom on which is journalled a gear 31 meshing with theother side of the double crown gear 9. An eccentric stud 32 projectsfrom the gear a pitman 34f pivotally engagedwith a connection 35 withthe outer shaft 10. The connections 21 and 35 are similarly constructedand the detailed description of the connection 35 about to be given willsuflice for the present purpose. Referring to Figures 4 and 5particularly it will be seen that the shaft 10 has a circular portionformed with an annular groove 36.

Ring portion 37 of the connection 35 is disposed circumj acent thegrooved annular portion 36 of the shaft 10 and has a screw 38 or similarmeans projecting into the groove.

A propeller 40 is mounted on one end of the outer shaft and a propellerll is mounted on the adjacent end of the inner shaft.

In the present embodiment of the invention, a portion 42 of the outershaft is cylindrical in construction and is slidable and journalledthrough a bearing sleeve 43 disposed through the rear end of the boat44. This mounting, of course, is not of the essence of the invention.

Now from the above of the practical embodiment of the inventionillustrated it will be readily apparent to those skilled in the art thatas the member 20 reciprocates both a rotary and reciprocatory motion isimparted to each of the two shafts l0 and 11. The shafts 1 0 and 11reciprocate in opposite direction but rotate in the same direction. p

It is thought that the construction, operation, utility and advantagesof this invention will now be quite apparent to those skilled in thisart without a more detailed description thereof.

fIt is apparent that changes in the details 0 arrangement of parts maybe resorted to With-. out departing from the spirit or scope of theinvention as hereinafter claimed or sacrificing any of its advantages.

Having thus described my invention, what I claim as new is:

In a propeller mechanism of the class described, an outer shaft, aninner shaft in the outer shaft, means causing the outer shaft and innershaft to rotate together and permitting the shaft to reciprocate withrespect to one another, propellers connected to adjacent ends of theshafts, and means for simul taneously rotating and reciprocating theshafts, said means comprising a crown gear on the outer shaft to rotatetherewithand permitting the outer therethrough, a pair of gears in meshwith the double crown gear, said gears being arranged on opposite sidesof the crown gear whereby the gears are rotated in oppositedirections,each gear .having a crank pinthereon, a pltman connecting the pin of onegear with one of the shafts, and a pitman connecting the pin of theother gear with the other shaft.

In testimony whereof I affix my signature.

JOE PIANO. f

detailed description.

construction, and in the combination and shaft to reciprocate

